Improvement in chain-pump buckets



E. HOYT. Chain-Pump Bucket.

No. 218,746. Patented Aug. 19,1879.

F'IG.5.

WITNESSES LN VENTOR i n 'y c/HTORNEY RAFHER. WASH 11111111 C.

UNITEESTATEs PATENT OEEICE EDWIN HOYT,

or sTAMEoED, CONNECTICUT, AssIeNon oF CNE-EAM? `E1s EIGHT To THEoDoEEEoYT, or SAME PLACE.

IMPROVEMENT IN CHAIN-PUMP BUCKETS.

Specification forming part of Letters Patent No. 2l 8,746, dated August19, 1879 g application iled December 19, 1878.

To all whom 'it may concern:

Be it known that I, EDWIN HCYT, ofv Stamford, in the countyof Fairfieldand -State of Connecticut, have invented certain new and useful 11nprovemen ts in Chain-Pump Buckets; and I do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it pertains to makeand use the saine, reference being had to the accompanying draw ings,and to the letters of reference marked thereon, which form a part ofthis specification.

This invention has for its object to furnish a chain-pump bucketpossessing; superior qualities in elasticity and capability ofadaptation to the bore of the tubing, and which may be reversed, ifdesired, without injury to its form or construction.

It consists in a hollow elastic shell or bucket made in one piece andoblate spheroidal in form, the outer or convex surfaces of the oppositeends or hemispheres of which unite and form a' thin horizontalcircumferential edge around its center on the line between saidhemispheres, as will be hereinafter explained;

`In the drawings, Figure l is an elevation, and Fig. 2 is a verticalsection of the same. Fig. 3 is an elevation of the link. Fig. et is amodication, and Fig. 5 shows the form the bucket takes when under thepressure of a column of water.

a is the elastic hollow bucket, the upper and lower hemispheres, al a2,of which are made cup or bowl shaped, equal in size and similar in form,with sides slightly convex, the surfaces of which unite and form a thincircumferential edge, a3, around its horizontal or equatorial center,which edge projects or stands outward at right angles to the verticaldiameter of said shell and fits snugly, making a substantial packingagainst the sides of the bore of the tubing, so that the bucket may bemoved up or down in said tube, as may be desired. The said edge readilyadapts itself to motion in either direction.

The wall of the shell a is made thin at its center, a3, and graduallyincreases in thickness toward both the ends, in which are the openingsto receive the link. This gives the proper elasticity, so that the shellwill readily adapt itself to the pump-tube, whether it is moved directlyor reversely, and vvat the same time a strong` collar is provided, whichgives a lirin hold around the link, and prevents the shell from slippingor springing out of place. It is provided with openings (one slightlylarger than the other) in its upper and lower ends, so that it may beeasily sprung onto the link b. It is also provided with smalldripopenings a4 a5, which permit the water to pass through it and fallin the tube or bore of the pump, thus preventing freezing. Thesedripopenings may be dispensed with in localities where the water is notliable to freeze.

b is the link, provided with eyes bllfor connectingpurposes. It isprovided With the two end or outside collars or iianges, Yb3 b, whichserve as outer bearings for thev ends of and cover the end openings inthe bucket when the lat-ter is sprung thereon. Itis also provided withthe two inner collars or flanges, b5 t6, arranged near to the collars b3b4, which remain inside and hold the ends of the bucket, and preventthelatter from slipping longitudinally on the stem of said link.

The stem of the link is made slightly larger in diameter between thecollars b3 b5 than between the collars b4 116. The larger diameter, c,fills the larger opening in the end of the bucket a, while the smallerdiameter, c1, fills the smaller opening in said bucket. The intermediatespace or diameter, c2, between the inner collars, b5 b, gives amplespace for the passage of the water through the bucket. The bucket issprung onto the link by passing the larger openin g over the eye b2, andover the collars b4, D6, and b5, While the other opening is passed overthe eye b2 and collar b4. The bucket will then be held firmly on thelink, as shown in Figs. 2 and 1.

In the operation of the bucket, the weight of the column of water beingraised depresses the upper hemisphere, al, and distends or bulges outthe lower hemisphere, a2, of the elastic shell, as shown in Fig. 5,without shortenin g the diameter, thus keeping the bore of the pumpentirely closed. When the hemispheres of the shell a are compressed intothe form shown in Fig. 5, the strength or lifting` power of the bucketis increased over what it would be were the parts to remain in theposition shown in Fig. 1, and it becomes equal in strength to what itwould be were it :made of solid rubber or other material, while at thesame time it possesses all the elasticity and capability of adaptationto the bore of pump tlais possessed by the ordinary hollow elastic s eIn Fig.4 is shown a slight modification in the form of the bucket a, inwhich the sides al a2 are straight, terminating at their centraljunction in the thin edge a3. I do not prefer this form, though it willgive very good satisfaction in its operation. It is too rigid, lackingthat perfect iiexihility and capability of automatic adaptation to thebore of' the pump thatis possessed by the shell first hereinbeforedescribed, and shown in Figs. 1, 2, and 5.

l am aware that elastic hollow buckets made in two pieces of unequalsize, having their edges rabbeted together or made in one piece withunequal hemispheres, united so as to form a lip or edge on the larger,which projects over the smaller hemisphere, have been in use, and arenot new, and I do not claim such devices as my invention.

Having described my invention, what 1 claim, and desire to secure byLetters Patent, is

The hollow reversible and elastic spheroidal shell a, having its wallsmade thin at its central or equatorial line, and gradually increased inthickness toward the points of attachment to the 1ink,'and having itsouter surfaces so graduated as to unite in a common point and form asingle circumferential projecting rim or lip, a3, surroundin git on itscentral or equatorial line, substantially as and for t-he purposes setforth.

In testimony that I claim the foregoing as my own I afx my signature inpresence of two Witnesses.

EDWIN HOYT.

Witnesses JONATHAN S. SEARLES, EDWARD A. LEEDs.

